I was mainly responding to the claim that he was "saying that AI was going to be a serious problem decades before anyone else was even considering it as a remote possibility." But we can also look at the specific predictions he's made.
https://www.longtermwiki.com/wiki/E643
Some that turned out to be wrong include: singularity by 2021, singularity by 2025, 70% chance of human extinction between 2003-2015, and that his team would build "final stage AI" reaching transhumanity between 2005-2020 ("probably around 2008 or 2010"). His only correct prediction to date has been that AI would win gold in the IMO by 2025.
If you have examples of other predictions of his that have come true, I'd be interested to hear them.